I have a 2203 that has a replaced output transformer. The replacement is a Hammond 1750U. If I were to make the effort to seek out a (possibly impossible to find) original output transformer, what would be the model number of that transformer? And, a question about power transformers. This amp has a T4074 PT. Is this also correct for this amp or should it be a T4145? What are the correct amp types that should have a T4145? The amp doesn't sound right. It's nowhere near the tone monster that my first 2203 was, which I sold simply because I got an exorbitant price for it. I'm thinking that the Hammond output transformer just isn't delivering the goods.